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Assure Directory

GemPen® by Gemometrics AB

Instrument Description

GemPen® is a handheld diamond verification instrument for loose and mounted stones. GemPen® is designed to separate diamonds from synthetic diamonds by providing professional users with the information required to manually screen diamonds from synthetic diamonds. GemPen® is suitable for field gemmologists, diamond buyers, wholesalers and retailers. ASSURE ID: 14933

Instrument Specs

Size: 24 cm (L) x 3.6 cm (W) x 3.2 cm (H)

Weight: 0.4 kg

Price: 2,300 USD (April 2019)

View Instrument Details

What Stones Can Be Tested?

Weight of stones: All

Size of stones: All

Colour of stones: D-M

Shape of stones: All

Diamond simulants: No

Jewellery: Yes (please note this has not yet been tested by the ASSURE Program)

 

Capabilities according to Gemometrics AB

Instrument Functionality

Automatically feed the stones? No

Automatically interpret the results? No

Automatically dispense the stones? No

Detect or refer synthetic diamonds? Detect

Multiple stones at one time? Yes

Training? Yes, through an online education platform

How Does it Operate?

The user manually places the stones in a case that function as a darkroom. After GemPen® is turned on and directed towards a gemstone, a fluorescing effect will occur. By manually analysing this effect, certain conclusions can be deducted. The user interprets the fluorescing effect and determine, with guidance from the GemPen® Diamond Map and online GemPen®, if the stone is a natural diamond or a synthetic diamond.

 

To increase the rate of correct interpretation from the results, Gemometrics always recommend the users to use other gemmological instruments, in addition to the GemPen®.

 

ASSURE Test

GemPen® was tested in accordance with the Diamond Verification Instrument Standard with the test protocol for instruments that separate diamonds from synthetic diamonds (Operation Category 1).

 

The tests took place at the independent laboratory UL in Canton, Massachusetts, United States. GemPen® requires manual interpretation and the instrument was tested both with a novice and a manufacturer appointed expert. The manufacturer appointed an expert from UL’s team. The below results are from the expert tests. Both the novice and the expert test results can be found in the summary report issued by UL. GemPen® was tested with the ASSURE Core Sample and ASSURE Smalls Sample.

 

The UL test summary report can be found here.

 


ASSURE Core Sample

The ASSURE Core Sample consists of 1,000 loose diamonds and 200 loose synthetic diamonds. The stones are 0.02 ct to 0.20 ct in D-J colour. The below results are from the test with the ASSURE Core Sample.

 

Diamond False Positive Rate Ratio of synthetic diamonds incorrectly classified as ‘diamond’ to the total number of synthetic diamonds 15.1%
Diamond Referral Rate Ratio of diamonds being referred for further testing to the total number of diamonds n/a
Diamond Accuracy Ratio of diamonds correctly classified as 'diamond' to the total number of diamonds 98.7%
Synthetic Diamond Accuracy Ratio of synthetic diamonds correctly classified as 'synthetic diamond' to the total number of synthetic diamonds 84.9%
Speed Stones tested per hour 813
ASSURE Smalls Sample

The ASSURE Smalls Sample consists of 1,000 loose diamonds and 200 loose synthetic diamonds. The stones are 0.005 ct to 0.02 ct in D-J colour. The below results are from the test with the ASSURE Smalls Sample.

 

Diamond False Positive Rate Ratio of synthetic diamonds incorrectly classified as ‘diamond’ to the total number of synthetic diamonds 4.7%
Diamond Referral Rate Ratio of diamonds being referred for further testing to the total number of diamonds n/a
Diamond Accuracy Ratio of diamonds correctly classified as 'diamond' to the total number of diamonds 99.5%
Synthetic Diamond Accuracy Ratio of synthetic diamonds correctly classified as 'synthetic diamond' to the total number of synthetic diamonds 95.3%
Speed Stones tested per hour 813
Where Do I purchase the Instrument?

Website: https://gemometrics.com/

Email: info@gemometrics.com

Phone: +46 72 44 99 05060

Safety Testing

The most important requirement when selecting a Diamond Verification Instrument is that the instrument meets the safety regulations of your local jurisdiction. Before purchasing an instrument, request that the manufacturer verifies that their instrument complies with all regulatory requirements.

 

Click here to download the safety testing credential for GemPen® submitted by Gemometrics. Please note that the safety testing credentials have not been validated through the ASSURE Program.